Other Parts Discussed in Thread: TMS320F28035, CONTROLSUITE
I have a modified SCI bootloader that I want to move from FlashA to OTP. I switched from a TMS320F28035 where the loader used to run in FlashA with no problems to a TMS320F28021 and want to use the same loader only in OTP. If the loader is loaded into FlashA on the 28021 it works well. If I download a new image It can overwrite itself and run the application with the standard jump to flash on a cpu reset (GPIO37 =1, GPIO34=1, TRST=0); When I put the loader into OTP, it starts (I have an led turn on, from a fresh power cycle), verifies the application image (which is good), jumps to FlashA(0x3F7FF6) and just sits there (from what I can tell from using the debugger). If I download the image (bootloader) using the debugger into OTP and hit the play button, it works fine. I've been floundering for a couple of days trying to figure out what the issue is (and I'm running out of bad board to test with), so any help is much appreciated. All the project files have been converted over to the 28021 from the 28035. Thanks much, Ron.
The only thing I wasn't sure about is the ExitBoot from the InitBoot.asm that I borrowed from the boot 28035 example (if it's compatible with the 28021), from they're both from the C2000 family?
The linker command file is below and I use InitBoot.asm (supplied by TI control Suite xx\controlSUITE\libs\utilities\boot_rom\2803x\2803x_boot_rom_v1) for the SCI bootloader to set the OTP Boot Values.
MEMORY
{
PAGE 0 :
SCIBOOTINIT : origin = 0x3D7800, length = 0x000050
SCIBOOT : origin = 0x3D7850, length = 0x0002FE
VERSION : origin = 0x3D7B50, length = 0x000004 //2 words // Current Version of BootLoader and date
BEGIN : origin = 0x3D7B54, length = 0x000002 /* Used for "boot to Flash" bootloader mode. OTP */
OTP_KEY : origin = 0x3D7BFE, length = 0x000001 /* Boot From One Time Programming */
OTP_BMODE : origin = 0x3D7BFF, length = 0x000001 /* Boot From One Time Programming */
PAGE 1 :
EBSS : origin = 0x0400, length = 0x002
STACK : origin = 0x0402, length = 0x200
}
SECTIONS
{
.InitBoot : load = SCIBOOTINIT, PAGE = 0
codestart : > BEGIN PAGE = 0
.text : load = SCIBOOT, PAGE = 0
.stack : load = STACK, PAGE = 1
.ebss : load = EBSS, PAGE = 1
.Version : load = VERSION, PAGE = 0
OTP_BMODE : > OTP_BMODE, PAGE = 0 /*Add OTP Boot Mode*/
OTP_KEY : > OTP_KEY, PAGE = 0 /*Add OTP Boot Key*/
}
InitBoot.asm
.global _InitBoot
.ref _SCI_Boot
;; .sect ".Flash" ; Flash API checks this for
;; .word 0xFFFE ; silicon compatability
.sect "OTP_KEY"
.word 0x55AA
.sect "OTP_BMODE"
.word 0x0006
.sect ".Version"
.word 0x0001 ; Boot ROM Version v.001
.word 0x0414 ; Month/Year: (ex: 0x0414 = 4/20 = Aug 2020)
; Use Hexidecimal for Month/Year
.sect ".InitBoot"
;--------------------------------------------------------------------------------------------------------------------------------------------
Linker File for Application:
MEMORY
{
PAGE 0: /* Program Memory */
/* Memory (RAM/FLASH/OTP) blocks can be moved to PAGE1 for data allocation */
RAMM0 : origin = 0x000050, length = 0x0003B0 /* on-chip RAM block M0 */
OTP : origin = 0x3D7800, length = 0x000400 /* on-chip OTP */
FLASHD : origin = 0x3F0000, length = 0x004050 /* on-chip FLASH 3000*/
FLASHC : origin = 0x3F4050, length = 0x000FB0 /* on-chip FLASH 1000 */
FLASHB : origin = 0x3F5000, length = 0x001000 /* on-chip FLASH */
FLASHA : origin = 0x3F6000, length = 0x001F7C /* on-chip FLASH - Note Last 4 bytes of Flash A is used for bootloader checks */
CSM_RSVD : origin = 0x3F7F80, length = 0x000076 /* Part of FLASHA. Program with all 0x0000 when CSM is in use. */
BEGIN : origin = 0x3F7FF6, length = 0x000002 /* Part of FLASHA. Used for "boot to Flash" bootloader mode. */
CSM_PWL_P0 : origin = 0x3F7FF8, length = 0x000008 /* Part of FLASHA. CSM password locations in FLASHA */
IQTABLES : origin = 0x3FE000, length = 0x000B50 /* IQ Math Tables in Boot ROM */
IQTABLES2 : origin = 0x3FEB50, length = 0x00008C /* IQ Math Tables in Boot ROM */
IQTABLES3 : origin = 0x3FEBDC, length = 0x0000AA /* IQ Math Tables in Boot ROM */
ROM : origin = 0x3FF27C, length = 0x000D44 /* Boot ROM */
RESET : origin = 0x3FFFC0, length = 0x000002 /* part of boot ROM */
VECTORS : origin = 0x3FFFC2, length = 0x00003E /* part of boot ROM */
PAGE 1 : /* Data Memory */
/* Memory (RAM/FLASH/OTP) blocks can be moved to PAGE0 for program allocation */
/* Registers remain on PAGE1 */
BOOT_RSVD : origin = 0x000000, length = 0x000050 /* Part of M0, BOOT rom will use this for stack */
RAMM1 : origin = 0x000400, length = 0x000400 /* on-chip RAM block M1 */
DRAML0 : origin = 0x008000, length = 0x000C00 /* on-chip RAM block L0 */
}
/* Allocate sections to memory blocks.
Note:
codestart user defined section in DSP28_CodeStartBranch.asm used to redirect code
execution when booting to flash
ramfuncs user defined section to store functions that will be copied from Flash into RAM
*/
SECTIONS
{
/* Allocate program areas: */
.cinit : > FLASHC PAGE = 0
.pinit : > FLASHC, PAGE = 0
.text : > FLASHD PAGE = 0
codestart : > BEGIN PAGE = 0
ramfuncs : LOAD = FLASHA,
RUN = RAMM0,
LOAD_START(_RamfuncsLoadStart),
LOAD_SIZE(_RamfuncsLoadSize),
RUN_START(_RamfuncsRunStart),
/* LOAD_START(_RamfuncsLoadStart),
LOAD_END(_RamfuncsLoadEnd),
RUN_START(_RamfuncsRunStart), */
PAGE = 0
csmpasswds : > CSM_PWL_P0 PAGE = 0
csm_rsvd : > CSM_RSVD PAGE = 0
/* Allocate uninitalized data sections: */
.stack : > RAMM1 PAGE = 1
.ebss : > DRAML0 PAGE = 1
.cio : > DRAML0 PAGE = 1 /* was PRAML0 PAGE 0 */
.esysmem : > RAMM1 PAGE = 1
/* Initalized sections go in Flash */
/* For SDFlash to program these, they must be allocated to page 0 */
.econst : > FLASHA PAGE = 0
.switch : > FLASHB PAGE = 0
/* Allocate IQ math areas: */
IQmath : > FLASHB PAGE = 0 /* Math Code */
IQmathTables : > IQTABLES, PAGE = 0, TYPE = NOLOAD
/* DSECT */
.reset : > RESET, PAGE = 0, TYPE = DSECT
vectors : > VECTORS PAGE = 0, TYPE = DSECT
}
---------------------------------------------------------------------------------------------------------------------------------------------------------------
The Jump to Flash A from InitBoot.asm (control Suite C:\TI\controlSUITE\libs\utilities\boot_rom\2803x\2803x_boot_rom_v1)
EntryAddr= 0x3F7FF6
...
...
_ExitBoot:
;-----------------------------------------------
; Insure that the stack is deallocated
;-----------------------------------------------
MOV SP,#__stack
;-----------------------------------------------
; Clear the bottom of the stack. This will endup
; in RPC when we are finished
;-----------------------------------------------
MOV *SP++,#0
MOV *SP++,#0
;-----------------------------------------------
; Load RPC with the entry point as determined
; by the boot mode. This address will be returned
; in the ACC register.
;-----------------------------------------------
PUSH ACC
POP RPC
;-----------------------------------------------
; Put registers back in their reset state.
;
; Clear all the XARn, ACC, XT, and P and DP
; registers
;
; NOTE: Leave the device in C28x operating mode
; (OBJMODE = 1, AMODE = 0)
;-----------------------------------------------
ZAPA
MOVL XT,ACC
MOVZ AR0,AL
MOVZ AR1,AL
MOVZ AR2,AL
MOVZ AR3,AL
MOVZ AR4,AL
MOVZ AR5,AL
MOVZ AR6,AL
MOVZ AR7,AL
MOVW DP, #0
;------------------------------------------------
; Restore ST0 and ST1. Note OBJMODE is
; the only bit not restored to its reset state.
; OBJMODE is left set for C28x object operating
; mode.
;
; ST0 = 0x0000 ST1 = 0x0A0B
; 15:10 OVC = 0 15:13 ARP = 0
; 9: 7 PM = 0 12 XF = 0
; 6 V = 0 11 M0M1MAP = 1
; 5 N = 0 10 reserved
; 4 Z = 0 9 OBJMODE = 1
; 3 C = 0 8 AMODE = 0
; 2 TC = 0 7 IDLESTAT = 0
; 1 OVM = 0 6 EALLOW = 0
; 0 SXM = 0 5 LOOP = 0
; 4 SPA = 0
; 3 VMAP = 1
; 2 PAGE0 = 0
; 1 DBGM = 1
; 0 INTM = 1
;-----------------------------------------------
MOV *SP++,#0
MOV *SP++,#0x0A0B
POP ST1
POP ST0
;------------------------------------------------
; Jump to the EntryAddr as defined by the
; boot mode selected and continue execution
;-----------------------------------------------
LRETR
;eof ----------
